WA State Landlord/ Tenant Notice to Vacate Question

[Manco Snead]

Greetings,

My property manager here in WA state did not put in the lease the requirements for notice to vacate/ # of days notice tenant must give before vacating. Current tenant wants to move at end of month, so is giving about 12 days notice.

1. If no description of this in lease what is required of the tenant? Nothing? Follow WA state law for tenant vacate notice?

2. If the tenant is giving notice on the 19th of this month and his lease ends the last day of this month ( unsure if this is the case or not) how does this effect notice to vacate given above?

Much thanks.